Specifications

PowerBook G4 (12" 1.5 GHz) Troubleshooting - 21
Sudden Motion Sensor (SMS) Symptom Charts
disables the sensor).
5. Type your administrator password when you are prompted and press Return.
6. Type the pmset -g # command again to be sure that the setting has been applied.
Any changes that you make to the Sudden Motion Sensor setting remains in effect even
after you restart the computer. If you choose to disable the Sudden Motion Sensor, Apple
recommends that you re-enable it as soon as possible in order to take full advantage of
the feature.
To re-enable the Sudden Motion Sensor:
1. From the Finder's Go menu, choose Utilities.
2. In the Utilities folder, open Terminal.
3. When the command line appears, type pmset -g # and press Return. If you have the
Sudden Motion Sensor turned off, the command will return a zero (0).
4. If the above command returns a zero, you can re-enable the Sudden Motion Sensor
by typing sudo pmset -a ams 1 and pressing Return.
5. Type your administrator password when you are prompted and press Return.
6. Type the pmset -g # command again to be sure that the setting has been applied.
Note: The Sudden Motion Sensor will not prevent hard drive failures. Its primarily function
is to prepare the hard drive for the impact of an accidental drop or severe vibration. It does
not assist in the other ways hard drives fail.